diff --git a/docs/src/fs.rst b/docs/src/fs.rst
index 48026b49..cd535f75 100644
--- a/docs/src/fs.rst
+++ b/docs/src/fs.rst
@@ -191,6 +191,9 @@ API
 
     Equivalent to ``mkdtemp(3)``.
 
+    .. note::
+        The result can be found as a null terminated string at `req->path`.
+
 .. c:function:: int uv_fs_rmdir(uv_loop_t* loop, uv_fs_t* req, const char* path, uv_fs_cb cb)
 
     Equivalent to ``rmdir(2)``.